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EP2067014A1 - Composition d'encre pour l'impression par jet d'encre - Google Patents

Composition d'encre pour l'impression par jet d'encre

Info

Publication number
EP2067014A1
EP2067014A1 EP07843310A EP07843310A EP2067014A1 EP 2067014 A1 EP2067014 A1 EP 2067014A1 EP 07843310 A EP07843310 A EP 07843310A EP 07843310 A EP07843310 A EP 07843310A EP 2067014 A1 EP2067014 A1 EP 2067014A1
Authority
EP
European Patent Office
Prior art keywords
ink composition
inkjet ink
combinations
inkjet
printer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP07843310A
Other languages
German (de)
English (en)
Inventor
Luanne J. Rolly
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hewlett Packard Development Co LP
Original Assignee
Hewlett Packard Development Co LP
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hewlett Packard Development Co LP filed Critical Hewlett Packard Development Co LP
Publication of EP2067014A1 publication Critical patent/EP2067014A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D11/00—Inks
    • C09D11/30—Inkjet printing inks
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
    • G01N1/30—Staining; Impregnating ; Fixation; Dehydration; Multistep processes for preparing samples of tissue, cell or nucleic acid material and the like for analysis
    • G01N1/31—Apparatus therefor
    • G01N2001/315—Basket-type carriers for tissues
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
    • G01N1/36—Embedding or analogous mounting of samples
    • G01N2001/366—Moulds; Demoulding

Definitions

  • the present disclosure relates generally to inkjet ink compositions.
  • Thermal inkjet printers use resistors to create heat, which in turn vaporizes ink to form a bubble. As the bubble expands, some of the ink is pushed out of the nozzle. A vacuum is created when the bubble collapses, which pulls more ink from the cartridge into the print head.
  • Inks that are predominantly water-based generally may not perform well in thermal ink jet printers. Poor performance may result because rapid water evaporation often leads to poor nozzle reliability (i.e., a crust of dried ink may clog the nozzle due to rapid water evaporation).
  • non-aqueous solvent-based inks i.e., inks made with solvents having a higher vapor pressure than water
  • aqueous inks on non-absorbent substrates due, at least in part, to higher vapor pressure and lower delta-H evaporation values.
  • Non-aqueous solvent-based inks may, however, be undesirable. This may be due, at least in part, to the amount of volatile organic compounds that may be present in such inks; the potentially high volatility of such inks; and/or the potential incompatibility of such inks with adhesives and polymers.
  • Non-aqueous solvent-based inks may also limit the materials suitable for constructing the printhead, as some of the solvents may be capable of ruining the printhead.
  • Combination aqueous- and solvent-based inks generally include enough of a low vapor pressure/high boiling point solvent to assist in controlling nozzle reliability. As the water in these inks evaporates, the solvents tend to remain in the firing chamber in order to keep the colorants and other materials in the ink solubilized. However, the quantity of solvent generally used to achieve nozzle reliability does not evaporate readily, thereby increasing dry times on non- absorbent substrates.
  • Embodiments of the inkjet ink composition disclosed herein are predominantly aqueous-based inks that are suitable for drop-on-demand thermal and piezoelectric inkjet printing.
  • the inkjet ink composition disclosed herein advantageously exhibits good smudge and/or abrasion resistance, enhanced decap performance, good nozzle health, better drop formation and ejection than inks based on water alone, and has a decreased dry time (i.e., unassisted air drying) when printed on non-absorbent media.
  • the term "decap,” as referred to herein, means the ability of the inkjet ink to readily eject from the print head, upon prolonged exposure to air.
  • the ink decap time is measured as the amount of time that an ink printhead may be left uncapped before the printer nozzles no longer fire properly, potentially because of clogging or plugging.
  • the nozzle(s) may become clogged/plugged by a viscous plug that forms in the nozzle(s) as a result of water loss, crusting of the ink, and/or crystallization of the dye in and/or around any of the nozzles.
  • ink droplets ejected through the nozzle's orifice may be misdirected, which may adversely affect print quality.
  • the orifice may also become completely blocked, and as a result, the ink droplets may not pass through the affected nozzle.
  • thermo inkjet ink composition includes 1 ,2- hexanediol; a solvent; an acrylic latex; a colorant; a dispersant; and a balance of water.
  • 1 ,2-hexanediol is present in the ink composition in an amount ranging from about 0.5 wt.% to about 2 wt.%.
  • the relatively small amount of 1 ,2-hexanediol is capable of concentrating at the air-ink interface in the nozzle. It is believed that this may be due, at least in part, to the fact that the 1 ,2-hexanediol is considered a quasi-surfactant having a hydrophilic end and a hydrophobic end. It is further believed that this substantially reduces the rate at which water loss occurs; thereby substantially preventing crusting of the nozzle and enhancing decap performance and nozzle reliability.
  • the total solvent concentration in the ink composition ranges from about 6 wt.% to about 10 wt.%.
  • the solvent is selected from dipropylene glycol monomethyl ether, tetrahydrofurfuryl alcohol (also known as tetrahydro-2-furanmethanol [97-99-4]), propylene glycol monopropyl ether, and combinations thereof. It is believed that the small amount of solvent, in combination with the 1 ,2-hexanediol, advantageously assists in maintaining nozzle health without negatively impacting the dry time of the ink when printed. Furthermore, it is believed that the small amount of solvent(s) achieves reliable drop formation and ejection.
  • the acrylic latex may be present in an amount ranging from about 1 wt.% to about 5 wt. %.
  • a non-limiting example of the acrylic latex includes polymer colloid particulates having surface acid groups which tend to be more stable over longer periods of time, and tend to resist aggregation. Examples of such polymer colloid particulates are further described in U.S. Patent Application Serial No. 10/772,792, published as U.S. Patent Publication No. 2005/0176847 on August 11 , 2005, which is incorporated herein by reference in its entirety. Without being bound to any theory, it is believed that the latex forms a thin film while incorporating the colorant(s), thereby enhancing the smudge resistance of the ink.
  • the inkjet ink composition also includes a colorant.
  • a colorant Generally, the amount of colorant ranges from about 0 wt.% to about 6 wt.%. In an embodiment, the colorant amount ranges from about 3 wt.% to about 6 wt.%.
  • Suitable colorants include pigments, dyes, or combinations thereof. The pigments may be nonionic, cationic, anionic, or combinations thereof, while the dyes may be cationic and/or anionic.
  • pigment refers to a colorant particle that is substantially insoluble in the liquid vehicle in which it is used.
  • Suitable pigments include self-dispersed pigments and non self-dispersed pigments.
  • Self- dispersed pigments include those that have been chemically modified at the surface with a charge or a polymeric grouping. This chemical modification aids the pigment in becoming and/or substantially remaining dispersed in a liquid vehicle.
  • a non-self-dispersed pigment utilizes a separate and unattached dispersing agent (e.g., polymers, oligomers, surfactants, etc) in the liquid vehicle or physically coated on the surface of the pigment.
  • the pigment is a self-dispersible anionic pigment.
  • a pigment precursor is chemically modified to impart water-dispersiblity to the precursor. Such modifications include the incorporation of carboxylate and/or sulfonate functionalities.
  • the anionic pigments are associated with Na + , Li + , K + , and NH 4 + cations, although any suitable counterion may be used herein.
  • a non-limiting example of a self-dispersible pigment is CAB-O-JET 300, which is commercially available from Cabot Corporation located in Boston, MA.
  • suitable black pigments include Raven 7000, Raven 5750, Raven 5250, Raven 5000, and Raven 3500 (all of which are commercially available from Columbian Chemicals, Co. located in Marietta, GA).
  • Other examples of suitable black pigments include Color Black FW 200, Color Black FW 2, Color Black FW 2V, Color Black FW 1 , Color Black FW 18, Color Black S 160, Color Black S 170, Special Black 6, Special Black 5, Special Black 4A, and Special Black 4 (all of which are commercially available from Degussa Corp. located in Parsippany, NJ).
  • colored pigments are capable of being modified via the attachment of organic group(s).
  • Suitable classes of colored pigments include, but are not limited to anthraquinones, phthalocyanine blues, phthalocyanine greens, diazos, monoazos, pyranthrones, perylenes, heterocyclic yellows, quinacridones, and (thio)indigoids.
  • Non-limiting examples of phthalocyanine blues include copper phthalocyanine blue and derivatives thereof (e.g., PB15).
  • Examples of quinacridones include, but are not limited to pigment orange (PO) 48, PO49, PR122, PR192, PR202, PR206, PR207, PR209, pigment violet (PV) 19, PV42, or combinations thereof.
  • Non-limiting examples of anthraquinones include PR43, PR194 (perinone red), PR216 (brominated pyrathrone red), PR226 (pyranthrone red), or combinations thereof.
  • Perylene pigment examples include, but are not limited to PR123 (vermillion), PR149 (scarlet), PR179 (maroon), PR190 (red), PR189 (yellow shade red), PR224, or combinations thereof.
  • Non-limiting examples of thioindigoids include PR86, PR87, PR88, PR181 , PR198, PV36, PV38, or combinations thereof.
  • suitable heterocyclic yellow pigments include, but are not limited to PY117, PY138, or combinations thereof.
  • Non-limiting examples of suitable dyes include direct yellow 86; acid red 289; direct blue 41 ; direct blue 53; direct blue 199; direct black 168; direct yellow 132; the Duasyn® line of dyes available from Clariant located in Coventry, Rl; direct black 168; reactive black 31 ; direct yellow 157; reactive yellow 37, acid yellow 23; reactive red 180; direct red 28; acid red 52; acid red 91 ; acid black 1 ; acid green 3; acid green 5; acid green 50; direct blue 199; acid blue 1 ; acid blue 9; acid blue 34; acid blue 90; acid blue 93; acid blue 104; reactive red 4; reactive red 56; acid red 92; or combinations thereof.
  • suitable dyes include Tricon acid red 52, Tricon direct red 227, Tricon acid yellow 17, Yellow Shade 16948 (all of which are commercially available from Tricon Colors Inc., located in Elmwood Park, NJ); Pergasol® Yellow CGP, Orasol® Black RL (Ciba-Geigy), Orasol® Black RLP (all of which are commercially available from Ciba Specialty Chemicals, located in Tarrytown, NY); Levafix® Brilliant Yellow E-GA, Levafix® Yellow E2RA, Levafix® Black EB, Levafix® Black E-2G, Levafix® Black P-36A, Levafix® Black PN-L, Levafix® Brilliant Red E6BA, and Levafix® Brilliant Blue EFFA (all of which are commercially available from DyStar Textilmaschine GmbH, located in Frankfurt, Germany); Procion® Turquoise PA, Procion® Turquoise HA, Procion® Turquoise Ho5G, Procion® Turquoise H-7
  • Procion® Red G Procion® Yellow MX-8G, Procion® Black H-EXL, Procion® Black P-N, Procion® Blue MX-R, Procion® Blue MX-4GD, Procion® Blue MX- G, and Procion® Blue MX-2GN (all of which are commercially available from DyStar Textilmaschine GmbH).
  • the dyes listed herein are examples of suitable dyes, however, it is to be understood that other dyes may be suitable for embodiments of the inkjet ink composition.
  • the dye may be color matched with the pigment (e.g., magenta dye with magenta pigment). Alternately, the dye and pigment may be different colors (e.g., magenta pigment with cyan dye).
  • the dye may be present in an amount ranging from about 0.5 wt.% to about 2 wt.%. It is believed that the dye increases the chroma and saturation of the printed ink on various forms of media.
  • a dispersant may also be included in the ink composition to aid in dispersion of the colorant.
  • the dispersant is present in an amount ranging from about 0.4 wt.% to about 0.6 wt.% of the weight of the pigment.
  • One class of dispersants suitable for use in embodiments of the ink composition includes those having a molecular skeleton of a styrene/acrylic acid copolymer resin. Generally, the dispersant has an acid number greater than or equal to 100, and a molecular weight equal to or less than 20,000.
  • suitable dispersants include those manufactured by BASF Corp., located in Florham Park, NJ, under the tradenames Joncryl 680 (molecular weight 4,900, acid value 215), Joncryl 682 (molecular weight 1 ,700, acid value 238), Joncryl 586 (molecular weight 4,600, acid value 108), Joncryl 683 (molecular weight 8,000, acid value 160), Joncryl 678 (molecular weight 8,500, acid value 215), Joncryl 671 (molecular weight 17,250, acid value 215), or combinations thereof.
  • Joncryl 680 molecular weight 4,900, acid value 215)
  • Joncryl 682 molecular weight 1 ,700, acid value 238)
  • Joncryl 586 molecular weight 4,600, acid value 108
  • Joncryl 683 molecular weight 8,000, acid value 160
  • Joncryl 678 molecular weight 8,500, acid value 215)
  • Joncryl 671 molecular weight 17,250, acid value 215), or combinations thereof.
  • the ink composition may also include other additives.
  • additives include water soluble polymers, surfactants (e.g., non-ionic surfactants, ethoxylated nonionic fluorosurfactants, etc.), buffers, biocides, sequestering agents, viscosity modifiers, surface-active agents, chelating agents, resins, and/or combinations thereof.
  • the balance of the inkjet ink composition is water.
  • Forming embodiment(s) of the inkjet ink composition includes providing or making the ink vehicle (e.g., solvents, acrylic latex, water), and adding the effective amount of colorant thereto.
  • the ink vehicle e.g., solvents, acrylic latex, water
  • the ink composition is established on at least a portion of a substrate to form an image.
  • the amount of the ink composition established depends, at least in part, on the desirable image to be formed.
  • the image may include alphanumeric indicia, graphical indicia, or combinations thereof.
  • a non- limiting example of a suitable inkjet printing technique includes thermal inkjet printing or piezoelectric inkjet printing.
  • Suitable printers include portable thermal or piezoelectric inkjet printers (e.g., handheld printers, arm mountable printers, wrist mountable printers, etc.), desktop thermal or piezoelectric inkjet printers, or combinations thereof.
  • the dry time is equal to or less than about 20 seconds. It is to be understood that the dry time may vary slightly, depending, at least in part, on the font and print density.
  • suitable non-absorbent substrates include, but are not limited to vinyl and other plastic sheets or films, metals, coated offset media, some wood materials, glass, and/or the like, and/or combinations thereof.
  • Some specific non-limiting examples of such substrates include polypropylene tapes, polyester tapes, polyethylene bags, water-resistant envelopes, aluminum foil, other substrates formed from polyethylenes and/or high-density polyethylenes, and/or combinations thereof.
  • embodiments of the inkjet ink composition disclosed herein may also be printed on absorbent substrates.
  • substrate materials include, but are not limited to plain papers, microporous photopapers, coated papers, glossy photopapers, semi- gloss photopapers, heavy weight matte papers, billboard papers, digital fine art papers, calendared papers, vinyl papers, or combinations thereof.
  • the ink formulations were printed on a variety of non-absorbent media and on plain paper using a thermal inkjet printer.
  • the unassisted dry time results are depicted in Table 2.
  • the dry time was measured by wiping the printed text with a soft cloth or tissue.
  • the text is printed at a 24 point font with a dot pattern at 25% depletion.
  • Table 2 Dry Time Results for the Ink Formulations on Different Media
  • ⁇ 5 seconds means that the printed ink smudges when tested at 0-1 seconds, but does not smudge at the 5-6 second point.
  • the " ⁇ 20 seconds” means that the printed ink smudges at 10-15 seconds, but does not smudge at the 20 second point. It is to be understood that the times are +/- 1 second. As depicted in Table 2, the dry times for ink formulations 1 and 2 were lower than the dry times for ink formulation 3 when printed on non-absorbent substrates.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Inks, Pencil-Leads, Or Crayons (AREA)
  • Ink Jet Recording Methods And Recording Media Thereof (AREA)

Abstract

Composition d'encre pour l'impression par jet d'encre comprenant un latex acrylique, un solvant, du 1,2-hexanediol, un colorant, un dispersant et de l'eau. Le latex acrylique est présent en quantité allant d'environ 1 % en poids à environ 5 % en poids. Le solvant est sélectionné parmi l'oxyde de dipropylèneglycol et de monométhyle, l'alcool tétrahydrofurfurylique, l'oxyde de propylèneglycol et de monopropyle et des associations de ceux-ci et il est présent en quantité allant d'environ 6 % en poids à environ 10 % en poids. Le 1,2-hexanediol est présent en quantité allant d'environ 0,5 % en poids à environ 2 % en poids et le colorant est présent en quantité allant d'environ 0 % en poids à environ 6 % en poids.
EP07843310A 2006-09-29 2007-09-27 Composition d'encre pour l'impression par jet d'encre Withdrawn EP2067014A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US11/529,876 US20080186373A1 (en) 2006-09-29 2006-09-29 Inkjet ink composition
PCT/US2007/079663 WO2008039902A1 (fr) 2006-09-29 2007-09-27 Composition d'encre pour l'impression par jet d'encre

Publications (1)

Publication Number Publication Date
EP2067014A1 true EP2067014A1 (fr) 2009-06-10

Family

ID=38776175

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07843310A Withdrawn EP2067014A1 (fr) 2006-09-29 2007-09-27 Composition d'encre pour l'impression par jet d'encre

Country Status (4)

Country Link
US (1) US20080186373A1 (fr)
EP (1) EP2067014A1 (fr)
CN (1) CN101523184A (fr)
WO (1) WO2008039902A1 (fr)

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Also Published As

Publication number Publication date
US20080186373A1 (en) 2008-08-07
WO2008039902A1 (fr) 2008-04-03
WO2008039902A9 (fr) 2014-11-27
CN101523184A (zh) 2009-09-02

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